This chapter begins with a discussion of the accidental discovery of electromagnetism by Hans Christian Oersted when he placed wire carrying electricity near a magnetic compass. Furthermore, Oersted proved that even a small amount of electricity (such as the electricity emitted by a cell battery) is capable of producing electromagnetism. After Oersted’s discovery, the French mathematician Ampère put forward the new concept of electrodynamics, by performing extensive studies on the movement of electric current in a conductor; subsequently, the galvanometer, a device to measure electric current, was developed. Michael Faraday discovered that wire carrying electricity can rotate on a magnetic pole; this was wrongly believed to be a primitive electric motor. An Englishman called Sturgeon subsequently discovered the first electromagnet.
MIT Press Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.
If you think you should have access to this title, please contact your librarian.
To troubleshoot, please check our FAQs, and if you can't find the answer there, please contact us.